# The Rule of 72 | Phil Town | Summary and Q&A

60.5K views
January 12, 2017
by
Rule #1 Investing
The Rule of 72 | Phil Town

## TL;DR

The Rule of 72 is a simple mathematical shortcut that helps calculate how long it takes to double your money with a fixed interest rate.

## Key Insights

• ⌛ Compound interest can have a significant impact on the growth of your investments over time.
• 🤑 The Rule of 72 helps estimate the time it takes to double your money, based on a fixed interest rate.
• 🦮 Understanding the Rule of 72 can help guide investment decisions and evaluate potential returns.
• 🧑‍🏭 It is crucial to consider the limitations of the Rule of 72 and factors beyond compound interest when making financial decisions.
• 🆘 Proper financial planning and understanding of compound interest can help secure a comfortable retirement.
• 🗯️ Warren Buffett advises that time can either be a friend or an enemy in investments, emphasizing the importance of choosing the right opportunities.
• 😫 The Rule of 72 allows investors to set realistic goals and targets for their investments based on desired rates of return.

## Transcript

hi guys I'm Phil town from rule 1 investing and today I want to talk to you about the famous rule of 72 [Applause] rule 72 what it is is a really handy little shortcut it is it constantly because it can tell me how long it takes me to double my money given a fixed interest rate so I don't use it like that all the time right what I do is I know how ... Read More

### Q: What is the Rule of 72 and how does it work?

The Rule of 72 is a shortcut that helps determine how long it takes to double your money with compound interest. By dividing 72 by the rate of return, you can find the number of years it will take to double the initial investment.

### Q: How can the Rule of 72 help with investment decisions?

The Rule of 72 can be used to assess the potential growth of an investment. By knowing how long it will take to double your money, you can evaluate whether the investment aligns with your financial goals and desired rate of return.

### Q: Can the Rule of 72 be used for different types of investments?

Yes, the Rule of 72 can be applied to any investment that involves compound interest. It can be used for stocks, bonds, real estate, or any other investment that offers a fixed rate of return.

### Q: What are the limitations of the Rule of 72?

The Rule of 72 assumes a fixed interest rate and does not account for fluctuations or unpredictable market conditions. It provides a rough estimate and should be used as a starting point for financial planning.

## Summary & Key Takeaways

• The Rule of 72 is a useful tool for understanding compound interest and how it can help grow your portfolio or investments.

• By dividing the number of years it takes to double your money into 72, you can determine the compounded annual growth rate.

• The Rule of 72 can also be used to calculate how long it will take to double your money based on a desired rate of return.